Cas 171820-61-4,2,3,6-tri-(thiophenyl)benzoquinone

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Check Digit Verification of cas no

The CAS Registry Mumber 171820-61-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,8,2 and 0 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 171820-61:
(8*1)+(7*7)+(6*1)+(5*8)+(4*2)+(3*0)+(2*6)+(1*1)=124
124 % 10 = 4
So 171820-61-4 is a valid CAS Registry Number.

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171820-61-4Relevant articles and documents

Conformational polymorphism in thiophenyl substituted quinones and the disappearing NMR spectrum

Kashyap, Ram P.,Sun, Duoli,Watson, William H.

, p. 339 - 350 (1995)

The stepwise addition of thiophenol to benzoquinone gives thiophenylbenzoquinone (1b),2,5- and 2,6-di-(thiophenyl)benzoquinone (2,3),2,3,6-tri-(thiophenyl)benzoquinone (4) and 2,3,5,6-tetra-(thiophenyl)benzoquinone (5).Compounds 1-4 can be crystallized, a

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171820-61-4